Dental impression-cup



(ModeL) J. v. MoMANN.

DENTAL IMPRESSION 0UP.

Patented Apr. 25, 1882..

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UNITED STATES PATENT OFFICE.

JAMES V. MGMANN, OF WAVERLY, OHIO.

DENTAL IMPRESSION-CUP.

SPECIFICATION forming part of Letters Patent No. 257,038, dated April25, 1882.

Application filed May 3, 1880. (Model.)

To all whom it may concern:

Be it known that I, JAMES V. MOMANN, of Waverly, in the county of Pikeand State of Ohio, have invented a new and useful Improvement inImpression-Cups for Dental Use, of which the following is a full, clear,and exact description, reference being bad to the annexed drawings,forming part of this specification.

-This invention relates to separable cups for holding plaster in takingimpressions of the gums where artificial sets of teeth are required.

The invention consists of a sectional cup formed in two parts, which arepivoted together in such manner that they shall be adapted to close todiminish the normal width of the cup and to be readily taken apart whendesired.

In the drawings, Figure l is a perspective view of the cup, showing theunder side; and Fig. 2, a view of the sections detached from each other.

The cup is divided through the center of the handle, forming twosections, A A, of nearly equal size, one of which has a lip, B, fittinginto a recess, G, in the other and seoured therein by means of a screw,D. The parts are thus pivoted together near the base of the handle, andthe recess 0 is made large enough to allow the lip B to oscillateslightly therein when the sides of the cup are compressed together; andto allow this movement patient, and by means of the screw the size of Vthe cup may be adjusted to fit the gums. After the impression is takenthe sections are to be taken apart to remove the cast.

I am aware that it is not broadly new to construct an impression-cup oftwo detachable sections for the purpose of facilitating the removal ofthe cast; but I am not aware that such a cup has before been madeadjustablein width, as above described.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

An impression-cup eonsistin g of the sections A A, beveled at theiradjacent edges, and having respectively the lip B and recess 0, and thescrew D, all combined, substantially as shown and described, whereby thesections may be adjusted to and from each other for convenience in use,as set forth.

JAMES V. MGMANN.

